Since the visitors alone are not expected to donate sufficient waste, Stewart imagines that new public toilets will be installed throughout London and that the waste collected there will power homes. Communities will congregate around these facilities in order to harvest the energy they will generate.

At this futuristic farmhouse, nothing will be wasted. Every calorie produced will be consumed as exhaustively as possible and then recycled. What’s more, animals will become more valuable as energy producers than food. Cows will be harvested for the methane gas they produce and electric eels will be used to power the elevators.

While this is definitely a funky design, we think it is an excellent thought experiment that takes a frank (and colorful!) look at how our basic needs may soon become very difficult to meet and how we will necessarily alter our thinking to find more creative energy sources.